Right now there's an interesting discussion about pitch shifting algorithms on music-dsp.

a.

On Tue, 2 Aug 2011 12:23:18 -0300 Alexandre Torres Porres porres@gmail.com wrote:

Thanks for the answers, I've seen the G.09 into an abstraction around and thought that th rjdj version could be it.

It's also on the pdmtl package right? In which there's also a shifter based on the phase vocoder, anyway, the idea was to ask for something new.

Thanks for the psola version julian, didn't know it, but as frank pointed, it may not suit me as I tried it and I prefer the phase vocoder version.

And Pierre, in the link you sent it warns that it works best for small deviations, which can actually be good for me in one specific application, but not much on another unfortunately. I will try it, thanks! Anyway, I made a quick google on Stephen M. Sprengler's pitch scaler design and found no info on what the procedure is like :(

By the way, I found this very interesting webpage about a pitchshifter~ object in Pd

http://www.katjaas.nl/pitchshift/pitchshift.html

But weirdly enough, I found no link to download it. By the fast look I gave it, it seemed to be an implementation based on the phase-vocoder process, right? But it also seems to differ in some way, could anyone tell me how exactly? And, well, most importantly, where is it???

thanks Alex

On Wed, Aug 3, 2011 at 12:23 AM, Alexandre Torres Porres porres@gmail.com wrote:

By the way, I found this very interesting webpage about a pitchshifter~ object in Pd http://www.katjaas.nl/pitchshift/pitchshift.html

On the same site you'll find reference to an external made from the soundtouch library, which provides both pitchshift and time stretching. The external is not yet released yet either, though after contacting the author it seems she would appreciate some help with a cross platform configure script so that she can release it.

-m